Respiratory muscles and the mechanisms of breathing.
D001945:Breathing Exercises; D006801:Humans; D007366:Intercostal Muscles / Q000502:physiology; D008168:Lung / Q000502:physiology; D009132:Muscles / Q000502:physiology*; D012119:Respiration / Q000502:physiology*; D013909:Thorax / Q000502:physiology*